Here is a link with lots of goodies. Some are add-ons, but some are stand alones.  Besides lots of animal textures and props, and a couple utilities, there is a hand grip pose that gives you a power grip or dextrous grip.  For both P4 and Millenium figures.

http://www.3dmenagerie.com/index-goo.htm

Use your scroll bar and scroll down.

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Too many projects, too little time.

thanks !  

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A very good site.